Baseline patient characteristics*
| Characteristic | WLI group (n=2258) | 2G-NBI group (n=2265) |
| Age, years† | 70.6±7.5 | 70.6±7.5 |
| Male sex, n (%) | 1753 (77.6) | 1774 (78.3) |
| Indication, n (%) | ||
| Current oesophageal cancer | 12 (0.5) | 10 (0.4) |
| History of oesophageal cancer | 373 (16.5) | 378 (16.7) |
| Current gastric neoplasm‡ | 68 (3.0) | 81 (3.6) |
| History of gastric neoplasm‡ | 1805 (80.0) | 1796 (79.3) |
*There were no significant differences between the two groups.
†Mean±SD.
‡Gastric neoplasms included gastric cancers and gastric adenomas.
WLI, white light imaging; 2G-NBI, second-generation narrow band imaging.